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C is portable, they lied lyingly like a liar

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AJ Martinez 2023-03-24 21:40:35 -07:00 • committed by James R
parent 78b30802bb
commit 056355d8ed
1 changed files with 3 additions and 4 deletions
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7
src/d_clisrv.c
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@ -247,7 +247,7 @@ static int IsExternalAddress (const void *p)
// Generate a message for an authenticating client to sign, with some guarantees about who we are. // Generate a message for an authenticating client to sign, with some guarantees about who we are.
void GenerateChallenge(uint8_t *buf) void GenerateChallenge(uint8_t *buf)
{ {
time_t now = time(NULL); UINT64 now = time(NULL);
csprng(buf, sizeof(&buf)); // Random noise as a baseline, but... csprng(buf, sizeof(&buf)); // Random noise as a baseline, but...
memcpy(buf, &now, sizeof(now)); // Timestamp limits the reuse window. memcpy(buf, &now, sizeof(now)); // Timestamp limits the reuse window.
memcpy(buf + sizeof(now), &ourIP, sizeof(ourIP)); // IP prevents captured signatures from being used elsewhere. memcpy(buf + sizeof(now), &ourIP, sizeof(ourIP)); // IP prevents captured signatures from being used elsewhere.
@ -273,16 +273,15 @@ void GenerateChallenge(uint8_t *buf)
// Don't sign anything that wasn't generated just for us! // Don't sign anything that wasn't generated just for us!
shouldsign_t ShouldSignChallenge(uint8_t *message) shouldsign_t ShouldSignChallenge(uint8_t *message)
{ {
time_t then, now; UINT64 then, now;
UINT32 claimedIP, realIP; UINT32 claimedIP, realIP;
now = time(NULL); now = time(NULL);
memcpy(&then, message, sizeof(then)); memcpy(&then, message, sizeof(then));
memcpy(&claimedIP, message + sizeof(then), sizeof(claimedIP)); memcpy(&claimedIP, message + sizeof(then), sizeof(claimedIP));
CONS_Printf("servernode: %d\n", servernode);
realIP = I_GetNodeAddressInt(servernode); realIP = I_GetNodeAddressInt(servernode);
if (abs(now - then) > 60*5) if ((max(now, then) - min(now, then)) > 60*5)
return SIGN_BADTIME; return SIGN_BADTIME;
if (realIP != claimedIP && IsExternalAddress(&realIP)) if (realIP != claimedIP && IsExternalAddress(&realIP))